The firm says Google+ has a real Facebook problem in terms of old habits die hard.

It suggests that all is not lost for Google and its social media endeavors though. The study says that Google can continue to draw traffic back and compete with Facebook by being ahead when it comes innovation.

Much of Google+'s early attraction was its exclusive invite only moniker and some of its features -- such as Hangouts and Circles -- that Facebook didn't have.

Facebook has since adopted some of those features, introducing its own version of Circles.